The Castle of São Jorge is a castle that occupies a commanding position overlooking the city of Lisbon and the Tagus River beyond. It was originally built by the Moors, but in its present configuration the strongly fortified citadel dates from medieval times.

It is located on top of the highest hill in the historic center of the city. In Portuguese it is called the Castelo de São Jorge

It is one of the main historical and touristic sites of Lisbon. The gardens of the Castelo are beautiful and well maintained. A five-arched Ogival House, once part of the 17th century jail located within St George Castle is worth seeing. The museum complex, the Interpretation Center for the City of Lisbon, is also worth a visit.